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dead channel

  1. A

    Sherwood S-7100 Magic Smoke

    Hi AK’ers, I’ve got a magic smoke story to share, and I’m hoping for some advice on how to fix it. I’ve been working on a Sherwood S-7110 for a bit now, I got it in pretty rough shape with no right channel output, and after some unhelpful attempts to “fix” it. After a full recap, a replacement...
    • atrelstad
    • Thread
    • blowing fuses dead channel magic smoke sherwood
    • Replies: 3
    • Forum: Solid State
  2. jefferylhenr

    Pioneer SX 3800 dead channel

    I have an SX3800 that was a total mess and dead as a door nail. Got everything addressed and working but some odd behavior with the channel balance. The left channel gain was lower than the right. Then it got worse and went dead except with loudness engaged. No sound on normal from left channel...
  3. JB8

    HARMAN KARDON 330A - Dead Right Channel

    Crew- I have another 330A, dead right channel, here's were I'm at. Initial testing revealed TR904 was bad so I replaced all four output transistors with 15034's TR608 & TR606 tested bad as well, replaced them with 1220 and 2690 (also replaced on left channel, I did this will all components I...
    • JB8
    • Thread
    • 330a dead channel harman kardon harman kardon 330a right channel dead right channel issue right channel no sound
    • Replies: 10
    • Forum: Solid State
  4. T

    denon pma-500v amplifier dead channel repair?

    I got this amplifier a while ago and I noticed that the fuse on one of the channels was blown (I think it's the right one). I measured the output transistors and the ones for the defective channel where shorted. I ordered some new ones and installed them (for both channels since I read online...
    • TrevorBarten
    • Thread
    • dead channel denon help japanese out transistors repair
    • Replies: 16
    • Forum: Solid State
  5. D

    G-3000 Repair & Rebuild - Dead Channel Question

    I recently picked up a G3000 as working that has a dead right channel and would appreciate a bit of advice! When I got it home I hooked it up to some junk test speakers just to see what I had. Right channel was dead with a bit of a hum (both through the speakers and headphones) and the left...
  6. James Cox

    Sherwood s-7900 with a dead right channel

    So I picked up a Sherwood s-7900 in beautiful cosmetic condition. Actually I picked up an entire carload of gear and after getting a pioneer sx-3700 and sx-780 sorted out(for the most part, still waiting on some final parts to fix a problem with the phono stage) and ordering some parts for the 2...
    • James Cox
    • Thread
    • dead channel diy repair s-7900 sherwood solid state transistor
    • Replies: 4
    • Forum: Solid State
  7. JB8

    SANSUI 2000 - Dead Right Channel

    Whelp, I finally snagged my first Sansui (it's about time) and I've got to say I'm already smitten! I really appreciate the way things are laid out and the general construction of the unit, but, I have a small problem, no right channel. Before powering up the unit after it arrived I checked the...
  8. SDup

    Help Troubleshooting Audio in One Channel Only + Hum

    I was listening to a record on Friday when the audio decreased suddenly. I checked my setup (description below) and I noticed that the left channel was dead. When I use balance to isolate it I get a hum (loudness increasing with volume) and when I turn the volume up to at least 50% I can hear...
    • SDup
    • Thread
    • channel failure dead channel hum in left channel hum in phono stage troobleshooting
    • Replies: 2
    • Forum: Turntables
  9. O

    Technics SA-5560K dead channel

    Hi, I have a Technics SA-5560K that I got recently for a very good price. The unit powers up, but the left channel is totally dead. I have tried all variations when connecting the speakers, but no luck. The radio works fine and so does connected equipment like CD-player. I haven't opened the...
    • OlleDahl
    • Thread
    • dead channel receiver sa-5560k technics
    • Replies: 5
    • Forum: Solid State
  10. JB8

    SONY STR-7035 - Dead Right Channel

    After cleaning pots and pushbuttons thoroughly (and multiple times), I'm still not getting any sound from the right channel via headphones or speaker outs. Cleaning the volume/balance pot increased the output of the good channel significantly, but the right channel is still dead. Right channel...
    • JB8
    • Thread
    • amplifier dead channel sony str-7035
    • Replies: 9
    • Forum: Solid State
  11. James Cox

    Citation II help!

    Alright guys so I'm pretty bummed out here. I have a citation II that I picked up about 6 months ago that had been restored to stock values and worked perfectly aside from a little more background noise than I expected. I decided since I had pretty good luck restoring a few tube amps and...
    • James Cox
    • Thread
    • citation ii dead channel power supply repair tube amp
    • Replies: 4
    • Forum: Tube Audio
  12. angelaudio

    Help repairing a dead channel on a Sylvania RQ-3747 receiver

    Hey folks I got this quadraphonic receiver a while back and I would like to fix it but I don’t know where to begin with the diagnosis and repair. It’s a quadraphonic receiver that can operate in 2-Channel bridged mode so I’m not sure if diagnosis and repair will be as straight forward as a...
    • angelaudio
    • Thread
    • dead channel sylvania quadrophonic receiver sylvania rq-3747
    • Replies: 2
    • Forum: DIY
  13. GnarlyBus

    Marantz 2235b - Intermittent Dead Channel

    I've had my Marantz for about 6 months. When I got it, I put LEDs in, replaced the vellum paper and DeOxited all switches and knobs. Lately it has started to have an intermittent dead left channel. It is not a dirty switch. When I use the preamp outs to hookup another amp it doesn't happen (so...
    • GnarlyBus
    • Thread
    • 2235b dead channel marantz receiver
    • Replies: 8
    • Forum: DIY
  14. NickDeO

    Requesting Troubleshooting Help - HK 730

    Hello again, AK! A few months ago, I picked up a Harman Kardon HK 730 Twin Receiver for around $160. I forget if the issue was "no sound at all" or "no sound in one channel" (I misplaced my original repair notes... whoops), but I had hoped that a recap and some DeOxit would get everything...
    • NickDeO
    • Thread
    • dead channel harman kardon hk 730 troubleshooting
    • Replies: 5
    • Forum: Solid State
  15. BigShooter

    Receiver has dead channel

    Hi all. Hope I can get some help here again... I retired recently and took up electronics (specifically vintage audio). I'm not a tech, and have minimal knowledge, but decent skills, and a love for vintage audio. So, I got hold of an old Allied model 355 receiver (I guess it's made by Pioneer)...
    • BigShooter
    • Thread
    • bad channel dead channel distortion low volume low volume one channel weak channel
    • Replies: 26
    • Forum: Solid State
  16. J

    Marantz 4240 faulty channel

    Hi! I have a 4240 which the Front Left channel is giving me some problems.When you turn on the Marantz it starts making a cracking sound that completely blocks out all the audio from that channel. This sound does not change with volume or any configuration, the only thing that changes is that if...
  17. BigShooter

    Dead channel with a caviat

    Hi folks. This is my first post here, so forgiveness please if I miss some needed info. I have a Lafayette LR-85 receiver that has a dead channel. It's dead no matter the input, and it's dead at the speaker and/or the head phone jack. Here is the caviat... When the unit is cold the dead channel...
  18. H

    Sansui AU-555A Dead right channel

    Hello, I have my old sansui 555a, in which some time ago I replaced all electrolytic capacitors and most transistors. Everything was great, but sometimes the right channel stopped working. I noticed that the problem may be in the switches, so I bought Deoxit D100 and Fadergrease and cleaned all...
    • harobike
    • Thread
    • dead channel right channel right channel dead sansui sansui 555a
    • Replies: 0
    • Forum: Exclusively Sansui
  19. M

    Reviving dead SX-680

    I bought this dead (no sound for both channels) SX-680 receiver for cheap to revive it. The first order of business is to blow away all the dirt, then clean all the knobs, switches and the connections at the back with electronic contact cleaner. Follow the service manual, I then replaced the...
  20. thorpej

    Adcom GFA-555 with dead left channel

    Hey folks -- A friend of mine has an Adcom GFA-555 with a dead left channel. I'm pretty comfortable servicing tube gear and solid state not so much, but these Adcom amps aren't terribly complicated, so I'm taking a crack at diagnosing the problem and repairing it for him. I had a few free...
  21. Justfurfun

    GreenHorns, from Stumptown

    Hi Guys, and greetings from Portland, Oregon. I am jumping into an audio restoration project, as a way to renew various audio gear from the "Golden Age" of HiFi! And why not? When I was a teenager, even the entry-level HiFi I could afford was pretty good, but, we didn't know how good "the...
  22. Adippell

    Technics SA 202 with a dead left channel

    Hello Ak’ers, Ok, so this is my first thread, aside from the introduction so please bear with my ignorance. I have a Technics SA-202 that I purchased at the Salvation Army for $15. It had a blown fuse on the back panel for the left channel. I replaced the fuse, but this didn’t rectify the...
    • Adippell
    • Thread
    • dead channel technics technics sa 202
    • Replies: 29
    • Forum: Solid State
  23. blankenship

    Sansui AU-717 dead channel

    My lovely AU-717 has been in (climate controlled) storage for awhile. I hooked it up the other day, and seemed to work fine—but with a scratchy balance pot. But as of yesterday, the amp is only amplifying the right channel—There is NO output from the left channel. I replaced the 4 fuses, but...
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